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    Piston, brake caliper

    Product number: D025684K
    ART: D025684K / EAN: 8430320300269

    AUTOFREN SEINSA
    Advised products
    Price incl. vat.
    € 60,05
    Add to cart
    Leverdatum: 14-06-2026

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    Manufacturer Model Version Engine code Construction type Construction start Construction end Pk Power kw
    AUDI AUDI
    BMW BMW
    CUPRA CUPRA
    FORD FORD
    FORD USA FORD USA
    JAGUAR JAGUAR
    LAND ROVER LAND ROVER
    SEAT SEAT
    SKODA SKODA
    VOLVO VOLVO
    VW VW
    Manufacturer Productnumber
    FORD 5317612
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    FORD DG9C2D252AB
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    VAG 5G0615423B
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    VAG 5G0615424C
    VAG 5G0615424D
    VAG 8V0615423
    VAG 8V0615423D
    VAG 8V0615424
    VAG 8V0615424D
    Usage numbers
    D0-25684K
    D025684K
    8
    43032E+12

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    Piston, brake caliper

    The Piston, brake caliper (D025684K) applies hydraulic force to the brake pads, ensuring strong and reliable braking performance. Replacing a worn piston restores smooth caliper function and consistent stopping power. Use Porza’s smart search to find the correct piston.

    FAQ

    A brake caliper piston is a cylindrical component inside the brake caliper that converts hydraulic pressure into mechanical force. When the brake pedal is pressed, brake fluid pushes the piston outward, pressing the brake pads against the disc to create friction and slow the vehicle. The piston then retracts slightly after braking to maintain proper clearance between the pads and the disc.

    Key specifications include piston diameter, height, material type, and surface finish. Pistons are commonly made from steel, aluminum, or phenolic (composite) materials. Steel pistons offer strength, while phenolic pistons provide better heat insulation. Surface treatments such as chrome plating or anodizing improve corrosion resistance and reduce friction. The piston must withstand high temperatures (often exceeding 200°C) and hydraulic pressure while maintaining dimensional stability.

    Replacement is necessary when the piston is corroded, pitted, seized, or causing brake fluid leaks. Symptoms include uneven braking, sticking calipers, or reduced braking performance. Pistons are often replaced during caliper overhaul along with seals and dust boots to restore proper function.

    Porza offers a fit guarantee option where your vehicle details, such as license plate or VIN, are checked against product specifications. This ensures the piston matches the exact diameter and design required for your brake caliper, minimizing the risk of incorrect fitment.

    Porza supplies high-quality brake components with fast delivery across Europe. Customers can order online or choose in-store pickup in the Netherlands, Germany, or Belgium. This allows quick access to essential parts for both professional workshops and individual users, with reliable availability and service.

    If you select the fit guarantee, Porza verifies compatibility before shipment. If the product does not fit or meet expectations, it can be returned according to the return policy. This ensures a secure and risk-free purchasing experience.

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